FLSA-2004:1324: Updated libxml2 resolves security vulnerability
Posted on: 10/07/2004 07:39 PM

Updated libxml2 packages are available for Red Hat Linux 7.3

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Fedora Legacy Update Advisory

Synopsis: Updated libxml2 resolves security vulnerability
Advisory ID: FLSA:1324
Issue date: 2004-10-04
Product: Red Hat Linux
Keywords: Security
Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=1324
CVE Names: CAN-2004-0110
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1. Topic:

[Updated 4th October 2004]
The packages contained in the original release of this advisory were missing python 2.2 support. These updated packages restore the missing functionality.

Updated libxml2 packages that fix an overflow when parsing remote resources are now available.

2. Relevant releases/architectures:

Red Hat Linux 7.3 - i386

3. Problem description:

libxml2 is a library for manipulating XML files.

Yuuichi Teranishi discovered a flaw in libxml2 versions prior to 2.6.6. When fetching a remote resource via FTP or HTTP, libxml2 uses special parsing routines. These routines can overflow a buffer if passed a very long URL. If an attacker is able to find an application using libxml2 that parses remote resources and allows them to influence the URL, then this flaw could be used to execute arbitrary code. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0110 to this issue.

All users are advised to upgrade to these updated packages, which contain a backported fix and are not vulnerable to this issue.

Fedora Legacy would like to thank Johnny Strom for reporting this issue.

4. Solution:

Before applying this update, make sure all previously released errata relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs.

Please note that this update is also available via yum and apt. Many people find this an easier way to apply updates. To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. This assumes that you have yum or apt-get configured for obtaining Fedora Legacy content. Please visit http://www fedoralegacy.org/docs for directions on how to configure yum and apt-get.

5. Bug IDs fixed:

http://bugzilla.fedora.us - 1324 - libxml2: an overflow when parsing remote resources.

6. RPMs required:

Red Hat Linux 7.3:

SRPM:
http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/libxml2-2.4.19-6.
legacy.src.rpm

i386:
http://download.fedoralegacy.org/redhat/7.3/updates/i386/libxml2-2.4.19-6.l
egacy.i386.rpm
http://download.fedoralegacy.org/redhat/7.3/updates/i386/libxml2-python-2.4
.19-6.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/7.3/updates/i386/libxml2-devel-2.4.
19-6.legacy.i386.rpm

7. Verification:

SHA1 sum Package Name
---------------------------------------------------------------------------

41e9e0daaf643f9d3ec96cbba7b050a397d1907e

7.3/updates/i386/libxml2-2.4.19-6.legacy.i386.rpm
130e6e03b76891959e58a3ddd56bc99777d76981

7.3/updates/i386/libxml2-devel-2.4.19-6.legacy.i386.rpm
42087ae0d2e5ee16c4ecf32478991d96ce0500cb

7.3/updates/i386/libxml2-python-2.4.19-6.legacy.i386.rpm
8a1d844bfb9494c00bd4a6dd2d95a0829daf9f42

7.3/updates/SRPMS/libxml2-2.4.19-6.legacy.src.rpm

These packages are GPG signed by Fedora Legacy for security. Our key is available from http://www.fedoralegacy.org/about/security.php

You can verify each package with the following command:

rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or tampered with, examine only the sha1sum with the following command:

sha1sum filename

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0110
https://www.redhat.com/archives/redhat-watch-list/2004-February/msg00007.ht
ml
http://mail.gnome.org/archives/xml/2004-February/msg00070.html


9. Contact:

The Fedora Legacy security contact is secnotice@fedoralegacy.org. More project details at http://www.fedoralegacy.org


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